Lake St. Louis is a medium-sized city located in the state of Missouri. With a population of 18,337 people and four associated neighborhoods, Lake St. Louis is the 45th largest community in Missouri.

Lake St. Louis real estate is some of the most expensive in Missouri, although Lake St. Louis house values don't compare to the most expensive real estate in the U.S.

Also of interest is that Lake St. Louis has more people living here who work in computers and math than 95% of the places in the US.

One interesting thing about the economy is that relatively large numbers of people worked from their home: 16.09% of the workforce. While this number may seem small overall, as a fraction of the total workforce this is high compared to the rest of the county. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

Because of many things, Lake St. Louis is a great place for families with children to consider. First of all, many other families with children live here, making Lake St. Louis a place where both parents and children are more likely to develop social ties with other families, as well as find family-oriented services and community. The city’s good public school district and large population of college-educated adults provide an environment conducive to academic values. With regard to real estate, Lake St. Louis has a high rate of owner-occupied single family homes, which tends to reflect stability in the local community. Finally, Lake St. Louis’s overall crime rate is lower than average for the country.

As is often the case in a small city, Lake St. Louis doesn't have a public transportation system that people use for their commute.

The citizens of Lake St. Louis are among the most well-educated in the nation: 49.71% of adults in Lake St. Louis have a bachelor's degree or even advanced degree, whereas the average US city has 21.84% holding at least a bachelor's degree.

The per capita income in Lake St. Louis in 2022 was $57,945, which is wealthy relative to Missouri and the nation. This equates to an annual income of $231,780 for a family of four.

Lake St. Louis is a somewhat ethnically-diverse city. The people who call Lake St. Louis home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Lake St. Louis residents report their race to be White, followed by Black or African-American. Important ancestries of people in Lake St. Louis include German, Irish, English, Italian, and French.

The most common language spoken in Lake St. Louis is English. Other important languages spoken here include Spanish and Other Asian languages.